Investments and Noncontrolling Interests (Tables)

3 Months Ended

Mar. 31, 2025

Equity Method Investments and Joint Ventures [Abstract]

The following table presents MPLX’s equity method investments at the dates indicated:


		Ownership as of	Carrying value at
		March 31,	March 31,		December 31,
(In millions, except ownership percentages)	VIE	2025	2025		2024
Crude Oil and Products Logistics
Illinois Extension Pipeline Company, L.L.C.		35%	$	225	$	218
LOOP LLC		41%	314		310
MarEn Bakken Company LLC(1)		25%	521		526
Other(2)	X		546		541
Total Crude Oil and Products Logistics			1,606		1,595
Natural Gas and NGL Services
BANGL, LLC		45%	279		281
MarkWest EMG Jefferson Dry Gas Gathering Company, L.L.C(3)	X	67%	428		329
MarkWest Utica EMG, L.L.C.	X	60%	782		742
Ohio Gathering Company L.L.C.(4)	X	34%	464		470
Sherwood Midstream LLC	X	50%	485		488
WPC Parent, LLC		30%	243		208
Other(2)	X		464		418
Total Natural Gas and NGL Services			3,145		2,936
Total			$	4,751	$	4,531

(1) The investment in MarEn Bakken Company LLC includes our 9.19 percent indirect interest in a joint venture (“Dakota Access”) that owns and operates the Dakota Access Pipeline and Energy Transfer Crude Oil Pipeline projects (collectively, the “Bakken Pipeline system”).

(2) Some investments included within Other have also been deemed to be VIEs.

(3) On March 31, 2025, MPLX contributed a 100 percent owned subsidiary with a fair value of $125 million to MarkWest EMG Jefferson Dry Gas Gathering Company, L.L.C. MPLX received a special distribution of $21 million as a result of the transaction, which is reflected as a return of capital on the consolidated statement of cash flows.

(4) MPLX also holds a 39 percent indirect interest in OGC through our ownership interest in MarkWest Utica EMG, L.L.C.